Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.

Abstract: A skewed image data detecting and correcting device includes a skew angle detecting module, and an image rotating correction module. A skewed image data detecting and correcting method includes the following steps. Firstly, a binary digitizing operation is performed to obtain a binary image data. The binary image data is rotated by multiple different rotating angles, thereby obtaining multiple rotated binary image data. The pixel numbers of all horizontal rows of the rotated binary image data are totalized, thereby obtaining multiple horizontal pixel number distribution curves. A high-pass filtering procedure is performed to filter off low-frequency noise, thereby obtaining multiple high-frequency signal curves. The square sums of respective high-frequency signal curves are calculated, thereby obtaining multiple index values.

Abstract: An apparatus and a method for eliminating glare are disclosed, wherein this method includes steps as follow. First, a first image is captured from an object when a first light source radiates light and a second light source is turned off, and a second image is captured from the object when the first light source is turned off and the second light source radiates light, wherein the first and second light sources are separate from each other. Then, a first glaring area is removed from the first image to create a first modified image, and a second glaring area is removed from the second image to create a second modified image. Then, the first and second modified images are merged to create a merged image.

Abstract: A pen-shaped input apparatus is disclosed in the disclosure. The pen-shaped input apparatus includes a body portion, a capturing module, a transparent spherical portion and a plurality of light sources. The body portion has a side surface. The capturing module is disposed within the body portion and adjacent to the side surface. The capturing module includes an optical sensor and a lens unit. The transparent spherical portion is disposed on the side surface. The transparent spherical portion, the lens unit and the optical sensor are lined on a capturing optical axis. The light sources are located between the side surface of the body portion and the transparent spherical portion. The light sources are symmetrically disposed around the capturing optical axis.

Abstract: An exemplary image control method is adapted for an image control system including a document camera and a first user device. In the image control method, the document camera generates a first image and provides the first image to the first user device for display. The first user device then produces a control information in response to an operation performed on the first image displayed on the first user device. After that, the first image is transformed into a second image. Finally, the first user device displays the second image.

Abstract: A video conference apparatus having a path-selecting unit is disclosed. A camera data captured by a camera can be transferred into the video processor via a content data path and be displayed as a content video, or the camera data can be transferred into a video processor via a camera data path and be displayed as a live video. A video conference method thereof is also disclosed.

Abstract: In a method for linking with a network image capture apparatus provided by the present invention, a tag having a tag information equipped on the network image capture apparatus is provided. The tag information contains a plurality of identification data of the network image capture apparatus. Then, the network image capture apparatus is attempted to link with a network. When the network image capture apparatus is linked with the network and broadcasts a beacon packet on the network, an image transmission link is established according to the beacon packet and the tag information.

Abstract: The invention discloses a multi-stream video system, a video monitoring device and a multi-stream video transmission method. The multi-stream video system includes at least one video capturing device and a video monitoring device. Each video capturing device is used for generating a plurality of video streams with different video specifications at the same time. The video monitoring device forms a telecommunication to each of the video capturing devices. When the video monitoring device performs an application operation, the video monitoring device selects and receives at least one video stream from each of the video capturing devices according to a video requirement of the application operation.

Abstract: A network videoconference equipment and its method of proceeding network videoconference are provided. The method implemented on a first terminal machine of a network videoconference system includes steps as follows. Directly connecting with a second terminal machine of the system when the second terminal machine requests to do so. Receiving and presenting a second location video and voice from the second terminal machine, sending a first predetermined message picture to the second terminal machine, and not sending a first location video and voice temporarily. Providing a human-machine interface on the first terminal machine for accepting an instruction of proceeding the network videoconference or not.

Abstract: A shift control method is used with a pen-shaped pointing device and a controlled device. Firstly, shift information, tilt angle information and rotating angle information in response to a configuration change of the pointing device relative to a supporting plane are sensed. Then, a shift estimation operation is performed by the controlled device according to the shift information, the tilt angle information and the rotating angle information, thereby acquiring a position-compensating data. If the pointing device is in contact with the supporting plane, a moving trajectory of the pointing device displayed by the controlled device is adjusted according to the position-compensating data.

Abstract: A support structure is disclosed, which includes plural cylindrical joints. Each cylindrical joint includes a cylindrical joint body having a wire channel for being passed through by a wire, a cylindrical joint head disposed on one end of the cylindrical joint body and having the wire channel, a cylindrical joint socket disposed on another end of the cylindrical joint body and having the wire channel The cylindrical joints are connected one by one by coupling the cylindrical joint to the corresponding cylindrical joint socket and are rotated along the radial direction of the cylindrical joint head.

Abstract: A document camera and its light box are provided in the disclosure. The light box includes a base, a light guiding plate embedded in the base, and a light source device movably disposed on the base. The light guiding plate has a light input face and a light output face which are both light transmissive from the base. When the light source device is moved to face the light input face, the light source device provides lights outwards the light guiding plate via the light input face, otherwise, when the light source device is moved away from the light input face, the light source device provides light to the light output face down wards.

Abstract: A size estimation method is used with a document camera to estimate an object size. The document camera includes a lens and an image sensor. The size estimation method includes the following steps. Firstly, an object distance between the lens and the object is detected. According to the object distance and a viewable angle of the lens, a shooting zone size is estimated. Then, the object is shot by the lens and the image sensor, thereby acquiring a digital image including an image of the object. Then, an effective pixel number corresponding to the object image is counted. Afterward, the size of the object is estimated according to the effective pixel number, a total pixel number of the image sensor and the shooting zone size.

Abstract: A display tilt-adjusting method is used between a pointing device and a display device. Firstly, first moving information is acquired in response to a movement of the pointing device. Then, error information is acquired according to the first moving information. According to the error information, the first moving information is transformed into second moving information. Afterwards, a moving path corresponding to the movement of the pointing device is shown on the display device according to the second moving information.

Abstract: A pointing device cooperates with a display device which shows a cursor moving in response to a movement of the pointing device. The pointing device includes a casing, a sensing unit and a modulation structure. The sensing unit senses a first movement of the pointing device to acquire first movement information when the sensing unit is arranged in a first position. The modulation structure connected with the sensing unit adjusts the sensing unit from the first position to a second position. Then, the sensing unit senses the first movement of the pointing device to acquire second movement information when the sensing unit is arranged in the second position. The moving path of the cursor is shown on the display device according to the first movement information or the second movement information.

Abstract: A document camera, an apparatus and a method for adjusting brightness are disclosed, wherein the apparatus includes a light module, a sensor and a digital signal processor (DSP). The sensor can capture image data. The digital signal processor can process the image data and retrieve a brightness value from the processed image data, so as to adjust a light-emitting brightness of the light module according to the brightness value.

Abstract: A presentation system includes a video supply device and a video receiver device. A presentation method is used with the presentation system and a network. The video supply device provides an image including an identification label corresponding to the video receiver device. At first, the video receiver device issues a sensing signal in response to a user's operating action on the video receiver device. After the video supply device receives the sensing signal through the network, the identification label in the image is displayed in a dynamic manner.

Abstract: A video transmission method is used with a video data providing device, a first video management device and a second video management device. Firstly, a video coding format supportable by the first video management device is retrieved by the video data providing device. Then, a video image is converted into video data by the video data providing device according to the video coding format, and the video data are transmitted to the second video management device. Afterwards, the video data are transmitted from the second video management device to the first video management device, and the video data are decoded by the first video management device according to the video coding format so as to acquire the video image.

Abstract: A lens connector is provided. The lens connector connects a document camera and a microscope. The lens connector comprises a lapping part and a cylindrical sleeve. The lapping part comprises a microscope eyepiece lapping end and a DC lens lapping end. A plurality of elastic pieces are formed on the microscope eyepiece lapping end, wherein an outer screw thread is formed on an outer sidewall of the elastic pieces. The DC lens lapping end connects the lens of the DC. The cylindrical sleeve comprises an axial through-hole, wherein an inner screw thread is formed along axial through-hole. The inner screw to thread of the cylindrical sleeve is adapted to the outer screw thread of the elastic pieces such that when the cylindrical sleeve rotates in a specific direction, the elastic pieces are simultaneously bent to fasten the eyepiece of the microscope.

Abstract: A surveillance system having a multi-area motion-detection function is described. The surveillance system includes a display, an area selection device, and a threshold input device. The display shows a surveillance video. The area selection device selects a first area and a second area on the display screen. The threshold input device sets a motion-detection threshold of the first area and a motion-detection threshold of the second area. When the result of the motion-detection exceeds the motion-detection threshold of the first area, the surveillance video is stored in a storage medium. When the result of the motion-detection exceeds the motion-detection threshold of the second area, the surveillance video is stored in the storage medium.